Subject: Subject: [checkperlmodules] The perl module IO::Interactive::Tiny could not be installed.
This module is required by cPanel, and the system may not function correctly until it is installed, and functional. Below is the results of the auto-install attempt:
Test Run
==============
Can't locate IO/Interactive/Tiny.pm in @INC (@INC contains: /usr/local/lib/perl5/5.8.8/x86_64-linux /usr/local/lib/perl5/5.8.8 /usr/local/lib/perl5/site_perl/5.8.8/x86_64-linux /usr/local/lib/perl5/site_perl/5.8.8 /usr/local/lib/perl5/site_perl .) at - line 1.
BEGIN failed--compilation aborted at - line 1.
Installer Run
==============

If the issue persists after that, can you please submit a ticket in WHM > Support Center > Contact cPanel or using the link in my signature. Please post the ticket number here after opening one for tracking purposes.

Staff Member

Your Perl binary appears fine for the location (/usr/bin/perl symlinked to /usr/local/bin/perl) as well as the version. Please try running the two commands I've noted to try to force updates. If those don't work, a ticket would be the best route.

The issue has been fixed now by Joshua B of cPanel's team.
What it was is a mixture of things.

During the update of the Perl Modules what was happening is because "Conserve Memory" was set to "On" under "Server Configuration > Tweak Settings > System" my system was trying to update with cpanm.

Updating with cpanm makes sense if you want to conserve memory during updates, as it only consumes 10MB RAM as opposed to good old cpan.

In my case, cpanm didn't exist as a command on my system, so when the updater was trying to fail back to it, it was unable to issue the command. Once Joshua set "Conserve Memory" to Off, this effectively allowed cpan to run (instead of cpanm).

So if you're having a similar issue and you need to conserve memory, make sure cpanm is installed, you can do this by typing "cpanm" (Without quotes) in terminal, if you get a "command not found" error, either it's not in your PATH or it isn't installed on your system (It's more likely not installed if you can run "cpan"). You can get more info on how to install cpanm here App::cpanminus - search.cpan.org

If you're not fussed about cpanm and would rather use cpan, set "Conserve Memory" to Off.

All "Conserve Memory" does is exactly what it says, but it's at the expense of CPU and Disk I/O.

Once you have done what you need to, be sure to run /scripts/upcp --force

I hope this helps anyone else that comes across this issue in the future.